Poly(methyl-methacrylate) nanocomposites with low silica addition

The Journal of Prosthetic Dentistry
Sebastian BalosOgnjan Luzanin

Abstract

Poly(methyl-methacrylate) (PMMA) represents the most popular current denture material. However, its major drawbacks are insufficient ductility and strength. The purpose of this study was to improve the mechanical properties of PMMA in denture base application by adding small quantities of nanosilica. Silica nanoparticles were added to the liquid component of the tested materials. The standard heat polymerizing procedure was followed to obtain 6 PMMA--silicon dioxide (/SiO2) concentrations (0.023%, 0.046%, 0.091%, 0.23%, 0.46%, and 0.91% by volume). Microhardness and fracture toughness of each set of specimens was compared with the unmodified specimens. Furthermore, differential scanning calorimetry and scanning electron microscopy analyses were conducted, and the results obtained were correlated with the results of mechanical properties. It was found that the maximum microhardness and fracture toughness values of the materials tested were obtained for the lowest nanosilica content. A nanosilica content of 0.023% resulted in an almost unchanged glass transition temperature (Tg), whereas the maximum amount of nanosilica induced a considerable increase in Tg. A higher Tg indicated the possible existence of a thicker interfacial la...Continue Reading

References

Jul 26, 2003·Journal of Oral Rehabilitation·R E KerbyO Tiba
Dec 22, 2005·Dental Materials : Official Publication of the Academy of Dental Materials·Kristen S Wilson, Joseph M Antonucci

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Citations

Nov 30, 2016·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Pinar Cevik, Arzu Zeynep Yildirim-Bicer
Nov 7, 2019·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Tahani H AbushowmiNadim Z Baba
Apr 2, 2020·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Mohammed M GadFahad A Al-Harbi
Oct 7, 2020·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Sara T AlzayyatMohammed M Gad
Feb 25, 2020·Journal of the Mechanical Behavior of Biomedical Materials·A MousaviD M Imani
Apr 23, 2021·Dental Materials Journal·Mohammed M GadFahad A Al-Harbi
May 4, 2021·The Japanese Dental Science Review·Mohammed M Gad, Ahmad M Al-Thobity

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